DNA recovered from 12000-year-old skeleton helps to dispel claims that first Americans came from Australia,Asia or EuropeThe remains of a small, delicate teenage girl who fell to her death in an underground cave system in Mexico 12000 years ago fill thrown fresh light on the origins of the first Americans.
Cave divers chanced upon the girl's skeleton, or along with the bones of sabre-tooth cats,giant ground sloths and cave bears, in a huge water-filled cavern they discovered while exploring a submerged network of tunnels reached from a sinkhole in the Yucatan jungle.
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Source: theguardian.com